Cooling system for internal-combustion engines



Oct. 15, 1929. H. A. FLOGAUS 1,

COOLING SYSTEM FOR INTERNAL COMBUSTION ENGINES Filed April 5, 1928 [II/I III Patented Oct. 15, 1929 UNITED STATES.

PATENT. OFFICE HOWARD A FLOGAUS, or DETROIT, MICHIGAN, AssIGivoR roRALrH Ii. SKINNER, or

v DETROIT, MICHIGAN COOLING SYSTEM FOR INTERNLAL-COMBUSTION ENGINES Application filed April 5, 1928. Serial No. 267,493.

My invention relates to novel and advantageous means for cooling internal-combustion engines and particularly their heads, whereby to effectively maintain the engine at a proper operating temperature and to increase the effectiveness of ant-i-detonating characteristics of the cylinder-heads.

To the attainment of these and other desirable objects, improved means are provided for supplying the cooling liquid to the head sections of the engines and for assuring the draining oil of the water in the engine cylinder heads when the water in the main. waterjacket is drawn off.

To enable those acquainted with this art to have a full and complete understanding of the invention, both from structural and functional standpoints, in the accompanying drawing forming a part of this specification a present, desirable or preferred embodiment of the invention has been illustrated. the same reference characters being used in the variousviews to designate the same parts of the mechanism.

' In this drawing:

Figure 1 is a fragmentary, longitudinal, vertical section through the top portion of a multi-cylinder engine incorporating the invention;

Figure 2 is a fragmentary cross-section through one of such cylinders; and

Figure 3 is a horizontal section on line 33 of Figure 2.

Referring to these drawings, it will be perceived that the several engine cylinders 11 are located inside of an outer casing 12, there-* by providing an intervening water-jacket around all of the cylinders, the two inner cylinders of such four-cylinder engine, as shown, being spaced apart somewhat further than the other cylinders. v,

Each such cylinder has the usual inlet and exhaust ports 14 and 15 respectively, and each cylinder is fitted internally with an inner, stationary cylinder or sleeve 16 spaced inwardly away from the outer cylinder, thereby providing an annularspacevoccupied by two, substantially, semi-circular, sliding valves 17 and 18 reciprocated in any approved manner, as by means of eccentrics,'not shown.

Of course, each such valve has an appropriate port therethrough to cooperate with *the corresponding intake or discharge port, as the case may be, of the outer cylinder, and

the inner cylinder or sleeve is ported in register with the ports of such outer cylinder.

Each engine piston 19 slides inside of the complementary cylinder and is joined to the engine crank-shaft by the usual connectingrod neither of which have been illustrated.

The top portion of the inner, stationary cylinder is equipped with a hollow head 21 fitted therein and supplied with an outstanding flange 22 which supports the head and which rests on top of theupper terminal flange of the inner cylinder, which in turn is supported by the cylinder walls.

These overlying flanges are secured inplace by any fastenings, such as screws or the like.

The under surface of such head or top closure is supplied with a series of abrupt steps through a hole in the casing with a liquidtight joint between them, whereby the sparkplug may be inserted in place and removed without interference with the water chamber formed by such casing and associated parts.

At one end, this casing is equipped with a water-discharge pipe orconnection 27 leading to the radiator of the vehicle, not shown.

In the water-j acket between theinner cylin ders, a vertical pipe 28 is located so that its open lower end' will receive relatively cool water as it is delivered to the lower part of the water-jacket in the ,usual way by the I customary water-pump.

At its upperend such pipe connects with streams of inflowing cold water directly played against those portions of the heads most likely to become heated in greater degree, and, inthis way, the stepped cylinderheads are adequately cooled toaugment and facilitate the performance of their desirable functions of assuring freedom from detona tion or too rapid flame propagation, with their incident undesirable noise and injury tobearings.

By having the bottom end of pipe 28 positioned or located lower than the bottoms of dered anti-detonating the cylinder-heads or lower than the plurality of discharge nozzles, when the Water is drained from the jacket, such pipe acts as a siphon to draw ofi simultaneously practically all of the water in the heads, which might otherwise be trapped therein and freeze during cold weather.

From the foregoing, it should be clear that this novel construction improves and accentuates the desired operation of the shoulproper water dra inage.

he invention is not limited to the precise heads and assures combination of a cylinder having inlet and cylinder-head in said cylinder, a delivery pipe extending into said head and having an outlet adjacent to the'bottom wall of said head, a feed-pipe connected to said delivery-pipe and extending down beyond the outlet of said delivery-pipe to secure siphon-drainage action, and means to force water through said pipes into" said cylinder-heads.

4. In I an internal-combustion engine, the combination of a water-j acketed cylinder having inlet and exhaust ports, valves controlling said ports, means to operate said valves, a cup-shaped cylinder-head in said cylinder, a delivery pipe extending into said head and having an outlet adjacent to the bottom wall of said head, a feed-pipe in and receiving water from said water-jacket and connected to said delivery-pipe and extending down beyond the outlet of said deliverypipe, to secure siphon-drainage action, and

means to force water into saidwater-jacket and through said feed and delivery pipes.

I In witness whereof I have hereunto set my hand. a

' HOWARD A. FLO GAU S,

and exact details of construction presented I.

and these may be modified within more or less radical "degree without departure from the heart and essence of the invention as defined by theappended claims and without the loss' of any of its substantial benefits and advantages. l

Iclaim:' r 1. In an internal-combustion engine, the

combinationof a cylinder having inlet and exhaust ports, valves controlling said ports,

means to operate said valves, a piston recipro- I J catory in'said cylinder, a cup-shaped cylin der-head in said cylinder having a bottomwall withastepped under surface, a pipe extending into said head and having an outlet directly adjacent to the bottom-wall of said head,- and means-t0 deliver cooling water through said rpipe on to said bottom wall.

7 =2. In an internal-combustion engine, the combination of a cylinder having inlet and exhaust ports, valves controlling said ports,

means to operate said valves, afcup-shaped cylinder-head in said cylinder, a pipe extending into said head and having an outlet adj acent to the bottom wall of said head, andmeans to deliver cooling water through said pipe into said head 3. In aninternal-combustion engine, the 

